Pipe blockage judging device of tubular belt conveyor and tubular belt monitoring method

Abstract

The invention relates to a pipe blockage judging device of a tubular belt conveyor and a tubular belt monitoring method.The pipe blockage judging device comprises a frame end disc and a tubular belt, the tubular belt is sleeved with the frame end disc, the pipe blockage judging device is characterized by further comprising a supporting carrier roller, an induction roller, a roller connecting rod and a pressure sensor, the supporting carrier roller is connected with the frame end disc, and the induction roller is connected with the roller connecting rod; the roller connecting rod is connected with the upward side of the frame end disc, the pressure sensor is fixed to the joint of the roller connecting rod and the frame end disc, the axis of the induction roller is connected with the roller connecting rod, the outer side of the induction roller is tightly attached to the tubular belt through gravity, the induction roller moves along with deformation of the tubular belt, and the roller connecting rod moves along with the induction roller. The pressure sensor generates a pressure signal when pressed by the roller connecting rod, and whether the tubular belt is blocked or not is judged based on the pressure signal of the pressure sensor. Compared with the prior art, the condition of the materials in the tubular belt is monitored when the tubular belt conveyor works.

Description

Technical Field

[0001] The present invention relates to the field of material transportation, and particularly to a pipe blockage judgment device for a tubular belt conveyor and a tubular belt monitoring method. Background Art

[0002] A tubular belt conveyor, as a conveying device designed specifically for bulk materials, is characterized in that its conveyor belt has a tubular structure. This device has a simple structure, strong conveying capacity, long covering distance and convenient maintenance. Its operation mechanism depends on the driving device to drive the conveyor belt to form a tube, and the material is fed into the conveyor belt through the feeding port and moves to the designated discharging point along with the belt body.

[0003] In the current operation process of the tubular belt conveyor, compared with the ordinary belt conveyor, the tubular belt conveyor can reduce material scattering and environmental pollution due to its closed structure, and is widely used in industries such as mines and cement. However, when the tubular belt conveyor conveys viscous materials or materials with higher humidity, it is easy to form accumulations on the inner wall of the tube, resulting in pipe blockage, causing abnormal friction of the belt, and causing additional running resistance, pipe shape resistance, rigidity resistance and bending resistance, etc., affecting the service life of the motor and the belt.

[0004] Chinese Patent Application CN107399583A proposes a warning protection system and method for the slack and breakage of the coal conveying belt of a belt conveyor, which is used for a coal mine transportation system, including a remote control console of the belt conveyor and a plurality of belt warning protection devices that are all wirelessly communicated with the remote control console of the belt conveyor, which can protect the belt conveyor, avoid the flying and throwing of the coal conveying belt of the belt conveyor from hurting the staff, is reliable and stable, avoid the rapid falling off of the coal conveying belt, and is stable and effective. However, this patent mainly aims at traditional open belt conveyors (such as coal conveying belts in coal mines), and judges slack or breakage by detecting the sag of the belt, but is not applicable to the pipe blockage problem of closed tubular belt conveyors. Due to the closed structure of the tubular conveyor, it is difficult to directly detect the internal material accumulation, and the eddy current displacement sensor of this patent relies on the belt sag signal and cannot penetrate the tubular structure to monitor the internal pipe blockage. During the monitoring process, a metal plate needs to be installed on the frame to cooperate with the eddy current displacement sensor, which requires high installation accuracy, and the metal plate is easy to corrode or accumulate dust in a humid and high-dust environment, resulting in misjudgment of the sensor. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned existing technologies and provide a pipe blockage judgment device for a tubular belt conveyor and a tubular belt monitoring method, which realizes the monitoring of the material condition inside the tubular belt during the operation of the tubular belt conveyor, and gives an alarm in time when there is a blockage or a material breakage, effectively improving the operation safety of the equipment and reducing the operation risk.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A pipe blockage judgment device for a tubular belt conveyor, comprising a frame end plate and a tubular belt. The frame end plate is sleeved on the tubular belt. The device further includes support rollers, an induction roller, a roller connecting rod, and a pressure sensor. Among them, the support rollers are connected to the frame end plate, the roller connecting rod is connected to the upper side of the frame end plate, the pressure sensor is fixed at the connection of the roller connecting rod and the frame end plate, the axis of the induction roller is connected to the roller connecting rod, and the outer side is in close contact with the tubular belt by gravity.

[0008] Judge whether the tubular belt is blocked based on the pressure signal of the pressure sensor.

[0009] Further, the number of the support rollers is not less than four.

[0010] Furthermore, the support rollers are evenly distributed around the tubular belt.

[0011] Furthermore, the support rollers on the same frame end plate are arranged in the same vertical plane.

[0012] Further, a tensioning screw adjustment mechanism is provided at the connection of the roller connecting rod and the induction roller.

[0013] Further, the pressure sensor is rigidly connected to the frame end plate.

[0014] Further, a ball bearing is embedded inside the induction roller.

[0015] Further, the device further includes a signal line and an alarm module. One end of the signal line is connected to the pressure sensor, and the other end is connected to the alarm module.

[0016] A tubular belt monitoring method using the pipe blockage judgment device for a tubular belt conveyor as described above. The method includes:

[0017] Step S1, obtaining the reference pressure value of the pressure sensor under normal operating conditions;

[0018] Step S2, collecting the real-time pressure signal value of the pressure sensor and denoising the real-time pressure signal value;

[0019] Step S3, comparing the denoised real-time pressure signal value with the reference pressure value. If the real-time pressure signal value is greater than the reference pressure value and the duration exceeds a preset first threshold, it is determined that the tubular belt is abnormal, and step S4 is entered. If the real-time pressure signal value is less than the reference pressure value and the duration exceeds a preset second threshold, it is determined that the conveying is abnormal, and step S5 is entered. Otherwise, return to step S2;

[0020] Step S4, if the real-time pressure signal value is greater than the reference pressure value but less than the preset pipe blockage pressure value, use the alarm device to give a pipe blockage alarm and do not stop the operation of the tubular belt conveyor; otherwise, while using the alarm device to give a pipe blockage alarm, stop the operation of the tubular belt conveyor.

[0021] Step S5, if the real-time pressure signal value is less than the reference pressure value but greater than the preset material shortage pressure value, use the alarm device to give a material shortage alarm and do not stop the operation of the tubular belt conveyor; otherwise, while using the alarm device to give a material shortage alarm, stop the operation of the tubular belt conveyor.

[0022] Further, the denoising includes low-pass filtering and moving average smoothing of the data.

[0023] Compared with the prior art, the beneficial effects of the present invention include:

[0024] 1. The device provided by the present invention can effectively monitor the operating state of the tubular belt conveyor in real time. The overall structure is simple. Through the combination of the pressure sensor, the induction roller and the roller connecting rod, the monitoring of the material situation inside the tubular belt during the operation of the tubular belt conveyor is realized, and an alarm is given in time when there is a blockage or a material shortage, effectively improving the operating safety of the equipment and reducing the operating risk.

[0025] 2. The present invention is installed on the existing frame end plate, externally installed, with a simple structure and convenient installation. No complex auxiliary equipment is required, and it can adapt to tubular belt conveyors with different pipe diameters, having strong expandability.

[0026] 3. The pressure sensor of the present invention is directly fixed on the base of the frame end plate, which can reduce the interference of the vibration caused by the operation of the tubular belt conveyor itself on the monitoring, and it is not easy to misjudge the working condition of the tubular belt.

[0027] 4. In the present invention, there are at least four supporting rollers evenly distributed around the tubular belt. The supporting rollers on the lower side of the tubular belt can support the weight of the tubular belt and the material in the tubular belt, and the supporting rollers on the side can maintain the shape of the tubular belt, preventing the tubular belt from spreading to both sides under the action of the material, keeping the overall transportation effect of the tubular belt good, reducing the probability of tubular belt blockage, and at the same time restricting the shape of the tubular belt is also beneficial to the monitoring of the material situation by the pressure sensor, the induction roller and the roller connecting rod.

[0028] 5. The connection between the roller connecting rod and the induction roller of the present invention is provided with a tensioning thread adjustment mechanism, which can be adjusted according to the pipe diameter and shape of the tubular belt of the tubular belt conveyor, change the contact pressure between the induction roller and the tubular belt, and realize more accurate and adaptable monitoring of the state of the tubular belt. Description of the Drawings

[0029] Figure 1 It is the structure diagram of the device of the present invention;

[0030] Figure 2 Schematic diagram of the operation of the device of the present invention;

[0031] Figure 3 Flow chart of the method of the present invention;

[0032] In the figure: 1 - frame end plate, 2 - support roller, 3 - induction roller, 4 - roller connecting rod, 5 - pressure sensor, 6 - pipe blockage area, 7 - pressure conduction direction, 8 - tubular belt. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] Embodiment 1

[0036] A pipe blockage judgment device for a tubular belt conveyor, as Figure 1 shown, including a frame end plate 1, a support roller 2, an induction roller 3, a roller connecting rod 4, a pressure sensor 5, and a tubular belt 8.

[0037] The frame end plate 1 is sleeved on the tubular belt 8. On a tubular belt conveyor, a plurality of frame end plates 1 will be provided to fix the tubular belt 8, and at least one pipe blockage judgment device will be provided on each frame end plate 1.

[0038] The support roller 2 is connected to the frame end plate 1. There are no less than 4 support rollers 2 and they are evenly distributed around the tubular belt 8. The support rollers 2 on the same frame end plate 1 are arranged in the same vertical plane. In this embodiment, 4 support rollers 2 evenly distributed around the tubular belt 8 are provided on one side of the frame end plate 1.

[0039] The roller connecting rod 4 is connected to the upper side of the frame end plate 1. The pressure sensor 5 is fixed at the connection between the roller connecting rod 4 and the frame end plate 1. The induction roller 3 is connected to the axis of the roller connecting rod 4, and the outer side is in close contact with the tubular belt 8 by gravity. A ball bearing is embedded inside the induction roller 3.

[0040] The induction roller 3 moves following the deformation of the tubular belt 8. The roller connecting rod 4 moves following the induction roller 3. When the pressure sensor 5 is pressed by the roller connecting rod 4, a pressure signal is generated. In this embodiment, when the tubular belt 8 is in a normal working state, the pressure generated by the roller connecting rod 4 on the pressure sensor 5 is a fixed value within a certain range. When a pipe blockage deformation occurs, that is, when the pipeline bulges, the induction roller 3 moves following the deformation of the tubular belt 8, and the roller connecting rod 4 moves following the induction roller 3, exerting greater pressure on the pressure sensor 5. When a material breakage occurs, that is, when the pipeline depresses, the induction roller 3 moves following the deformation of the tubular belt 8, and the roller connecting rod 4 moves following the induction roller 3, exerting less pressure on the pressure sensor 5 or losing pressure.

[0041] A tightening and loosening thread adjustment mechanism is provided at the connection between the roller connecting rod 4 and the induction roller 3, which can finely adjust the contact pressure between the induction roller 3 and the tubular belt 8, realizing more accurate and adaptable monitoring of the state of the tubular belt. When more sensitive monitoring is required, the tightening and loosening thread adjustment mechanism can be tightened to increase the contact pressure between the roller 3 and the tubular belt 8. Conversely, more rough monitoring can be carried out.

[0042] The connection between the pressure sensor 5 and the frame end plate 1 is a rigid connection, while the connection with the roller connecting rod 4 is a detachable connection. The rigid connection with the frame end plate 1 can reduce the interference of the vibration caused by the operation of the tubular belt conveyor itself on the monitoring, and it is not easy to misjudge the working condition of the tubular belt.

[0043] In this embodiment, when the pipe blockage judgment device of the tubular belt conveyor encounters a material blockage, that is, a pipe blockage phenomenon, its structure is as Figure 2 shown:

[0044] When materials, due to various reasons such as large coal quality viscosity or increased water content after rain, cause material accumulation inside the tubular belt 8, forming a pipe blockage area 6. At this time, the tubular belt conveyor is in an operating state. The pipe blockage area 6 passes through the contact area between the induction roller 3 and the tubular belt 8 along the running direction. The deformation generated by the pipe blockage area 6 is transmitted to the pressure sensor 5 along the pressure conduction direction 7 (induction roller 3 → roller connecting rod 4 → pressure sensor 5). The pressure sensor 5 generates a signal, and it is judged whether a pipe blockage phenomenon occurs in the tubular belt conveyor by the signal state. If the signal value is greater than the signal value in the normal state, the tubular belt conveyor stops running, facilitating personnel to clean the accumulated materials in time.

[0045] When the tubular belt conveyor is running, the tubular belt conveyor continuously maintains motion. The induction roller 3 and the tubular belt 8 are always in contact and generate a relatively stable pressure reference value. Therefore, the signal generated by the pressure sensor 5 should be delayed to avoid misoperation.

[0046] Embodiment 2

[0047] This embodiment aims to disclose a pipe blockage judgment device for a tubular belt conveyor based on the pipe blockage judgment device of the tubular belt conveyor disclosed in Embodiment 1, which further includes a signal line and an alarm module.

[0048] One end of the signal line is connected to the pressure sensor 5, and the other end is connected to the alarm module.

[0049] When the pressure sensor is pressed, a pressure signal will be generated. The pressure signal will be transmitted along the signal line to the alarm module, and the alarm module will judge and alarm the pressure signal.

[0050] Embodiment 3

[0051] This embodiment aims to disclose a tubular belt monitoring method based on the pipe blockage judgment device of the tubular belt conveyor disclosed in the above Embodiments 1 and 2. The method is as Figure 3 shown, and specifically includes:

[0052] S1. Obtain the reference pressure value of the pressure sensor under normal operating conditions;

[0053] S2. Collect the real-time pressure signal value of the pressure sensor and denoise the real-time pressure signal value;

[0054] S3. Compare the denoised real-time pressure signal value with the reference pressure value. If the real-time pressure signal value is greater than the reference pressure value and the duration exceeds the preset first threshold, it is determined that the tubular belt is abnormal, and S4 is entered. If the real-time pressure signal value is less than the reference pressure value and the duration exceeds the preset second threshold, it is determined that the conveying is abnormal, and S5 is entered. Otherwise, return to S2;

[0055] S4. If the real-time pressure signal value is greater than the reference pressure value but less than the preset pipe blockage pressure value, use the alarm device to alarm for pipe blockage without stopping the operation of the tubular belt conveyor. Otherwise, stop the operation of the tubular belt conveyor while using the alarm device to alarm for pipe blockage;

[0056] S5. If the real-time pressure signal value is less than the reference pressure value but greater than the preset material breakage pressure value, use the alarm device to alarm for material breakage without stopping the operation of the tubular belt conveyor. Otherwise, stop the operation of the tubular belt conveyor while using the alarm device to alarm for material breakage.

[0057] Denoising includes low-pass filtering and moving average to smooth the data.

[0058] After the staff repairs the tubular belt conveyor and eliminates the pipe blockage alarm or the material shortage alarm, it is necessary to re-obtain the reference pressure value in step S1 to ensure adaptation to the change of working conditions.

[0059] Every 24 hours or after changing the material type, it is also necessary to automatically re-obtain the reference pressure value collected in step S1.

[0060] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A pipe-blocking judgment device for a tubular belt conveyor, comprising a frame end plate (1) and a tubular belt (8), wherein the frame end plate (1) is sleeved on the tubular belt (8), and is characterized in that, The device further includes supporting idlers (2), an induction roller (3), a roller connecting rod (4), and a pressure sensor (5). Among them, the supporting idlers (2) are connected to the frame end plate (1), the roller connecting rod (4) is connected to the upper side of the frame end plate (1), the pressure sensor (5) is fixed at the connection between the roller connecting rod (4) and the frame end plate (1), the axis of the induction roller (3) is connected to the roller connecting rod (4), and the outer side is in close contact with the tubular belt (8) by gravity. Judge whether the tubular belt (8) is blocked based on the pressure signal of the pressure sensor (5).

2. The pipe blockage judgment device of a tubular belt conveyor according to claim 1, characterized in that, There are no less than four of the supporting idlers (2).

3. The pipe blockage judgment device of a tubular belt conveyor according to claim 2, characterized in that, The supporting idlers (2) are arranged evenly around the tubular belt (8).

4. The pipe blockage judgment device of a tubular belt conveyor according to claim 2, characterized in that, The supporting idlers (2) on the same frame end plate (1) are arranged in the same vertical plane.

5. The pipe-blocking judgment device of a tubular belt conveyor according to claim 1, characterized in that, An adjusting mechanism for tightening and loosening threads is provided at the connection between the roller connecting rod (4) and the induction roller (3).

6. The pipe blockage judgment device of a tubular belt conveyor according to claim 1, characterized in that, The pressure sensor (5) is rigidly connected to the frame end plate (1).

7. The pipe blockage judgment device of a tubular belt conveyor according to claim 1, characterized in that, A ball bearing is embedded inside the induction roller (3).

8. The pipe blockage judgment device for a tubular belt conveyor according to claim 1, characterized in that, The device further includes a signal line and an alarm module. One end of the signal line is connected to the pressure sensor (5), and the other end is connected to the alarm module.

9. A tubular belt monitoring method using a pipe blockage judgment device for a tubular belt conveyor as described in any one of claims 1-8, characterized in that, The method includes: Step S1, obtain the reference pressure value of the pressure sensor under normal operating conditions; Step S2, collect the real-time pressure signal value of the pressure sensor and denoise the real-time pressure signal value; Step S3, compare the denoised real-time pressure signal value with the reference pressure value. If the real-time pressure signal value is greater than the reference pressure value and the duration exceeds a preset first threshold, it is determined that the tubular belt is abnormal, and step S4 is entered. If the real-time pressure signal value is less than the reference pressure value and the duration exceeds a preset second threshold, it is determined that the conveying is abnormal, and step S5 is entered. Otherwise, return to step S2; Step S4, if the real-time pressure signal value is greater than the reference pressure value but less than the preset pipe-blocking pressure value, use the alarm device to give a pipe-blocking alarm and do not stop the operation of the tubular belt conveyor. Otherwise, use the alarm device to give a pipe-blocking alarm and stop the operation of the tubular belt conveyor at the same time; Step S5, if the real-time pressure signal value is less than the reference pressure value but greater than the preset material-breaking pressure value, use the alarm device to give a material-breaking alarm and do not stop the operation of the tubular belt conveyor. Otherwise, use the alarm device to give a material-breaking alarm and stop the operation of the tubular belt conveyor at the same time.

10. A method for monitoring a tubular belt according to claim 9, characterized in that, The denoising includes low-pass filtering and moving average smoothing of data.

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